Improved machine for pressing- and graining powder



N,FETERS. PHOTO-LHLHDGRAPHER, WASHINGTON: D. C.

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Letters Patent No. 101,032, (lated March 22, 1870.

IMPROVED MACHINE FOR PRESSING- AND GRAINING- POWDER.

The Schedule referred to in these Letters Patent and making part of the same To whom tt may concern Be it known that I, PAUL A. OLIVER, of the city, conntyand State of New York, have invented a new and useful Improvement in Machine for Pressing and Graiuing Powder; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings forming part of this specification.

'Ihis invention relates to a new and useful machine for facilitating the manufacture of gun and blastingpowder; and consists in a new and improved method of pressing the material into sheets and iii-cutting the sheetsinto grains, as hereinafter more fully described.

In the accompanying drawingf- Figure 1 is a vertical section of the machine, on the line` a: a: of iig. 2

Figure 2 is a top or plan View.`

Figure 3 is a detail view, showing a section of one of the graining-cylinders and ofy the stationary comb for cleaning the graining-teeth.

Figure 4 is a `detailed view, showing the method of adj ustiug one of the pressing-rollers and thereby varying the thickness of the sheets or cakes before grainnw.

lSimilar letters of reference indicate correspoxnling parts.

A represents the flame-work o f the machine, which may be made of either wood or metal.

B and C are t-he pressing-cylinders.

I) andE are the grainilig-cylinders.

F is the hopper. p

G is the driving-pinion on the shaft 1I.

The pressing-e'ylimlers B C and the graining-t-,ylinders DE are so operated by means of a lsystem of gearing-wheels from the pinion G, or by means of belts or otherwise, that the upper surfaces of each pair turn toward each other; consequently they are self-feedin".

The cylinders are revolved on suitable journals s upported by the frame, to the ends of which journals the gear-wheels are attached, which operate as before mentioned. rlhe pressing-rollers B C are plain cylin'- ders, of the proper length 'and' diameter, and of any material suitable for the purpose.

I I are adjustingfscrews in the upper part of the frame, by means of which the pressing-cylimler G is adjusted to the other cylinder, B. Bythis means the sheet or cake of powder is pressed to the desired thickness. lhe pressure which may thus he applied is limited only by the strength of the material of which the cylinders and frame are composed.

I do not confine myself to one pair of rollers for pressing the powder. More may be used, placed under the first in succession.

The grainiug-cylinders are placed directly beneath the pressing-cylinders, so that they receive the sheet and operate upon it by means of teeth in each cylinder, which teeth engage with or mesh into each other, and cut or break the sheet into grains of the desired size.

Various pairs of these cylinders may be employed, separately or in combination, to produce grains ofthe desired size.

I do not confine myself to this particular method of graining. Any other device suitable for the purpose may be employed, either in connection with or separate from the pressing-cylindcrs.

The powder is delivered from the graining-cylinders onto sieves or screens for properly asserting the grains.

By the mode at present pursued, hydrostatic presses are employed to press the powder into cakes. These cakes are broken into pieces, and finally the pieces are. broken into grains, which is a very slow and tedious process, requiring expensive machinery. By my improvement this is all done at one operation and without handling.

Ihe powder 'or mixture is placed in the hopper, thc slide K is drawn back, and as the cylinders revolve they press the powder into sheets of proper thickness, which are broken up by the graining-cylinders to the desired ineness.. The spaces between the grainingcylinders are cleaned by means of the teeth ofthe stationary combs L L, which engage with the teeth of the cylinders I) E, as shown in iig. l, and also in tig. 3.

'l-l'aving thusdescribcd my invention,

I claim as new and desire to secure by Letters Patentv 1. rlhe use of cylinders or rollers for pressing gun or blasting-powder, substantially as described.

2. The combination of the rollers or cylinders B CY and 'D E in a machine, substantially as and for the purposes herein shown and described.

PAUL A. OLIVER.

Witnesses: ms. F. Mom., 'Ionnnu'r Oonrnm.: 

